Improvement in plows



H. D. MARTIN.

Plow.

No 33 256 I Patented Sept 10, 186i.

UNITED STATES PATENT OFFICE.

HENRY n. MARTIN, on YPSILANTI, MICHIGAN.

IMPROVEMENT IN" FLOWS.

Specification forming part of Letters Patent No. 33,256, dated September 10,. 1861.

To all whom it may concern.-

Be it known that I, HENRY D. MARTIN, of;

- description.

F is a revolving mold-board, formed with three or more concave and spiral faces and journaled in an oblique position.

G is a curved colter projecting upward from the share A.

H and I are flanges projecting backward from the standard J and share A, respect? ively, for the purpose of conducting the fur row-slice from the latter onto the revolving mold-board. It is then turned over eifectu' ally and with great ease. l

The mold-board is preferred'to be hollow, and may be cast entire or formed of steel plates connected by bolts. a

The framing maybe of either wood oriron. Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is I The combination of the share A, colter G, standard J flanges H and I, and revolving mold-board F, arranged and operating in the manner and for the and explained. V

HENRY D. MARTIN.

Inpresence of A. "C. BLononT,

JOHN CARPENTER.

purposes herein shown 

